National Item Identification Number
01-057-1189
010571189
6650-01-057-1189
6650010571189
National Stock Number
Item Name
WINDOW,OPTICAL INSTRUMENT
Federal Supply Class
6650
Description
A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
7361255
Required Categories
MATERIAL
DIAMETER
THICKNESS
THE MANUFACTURERS DATA
MANUFACTURERS CODE
DESIG
Required Description
GLASS,DD-G-451,TYPE I,CLASS 1,QUALITY Q1 OR Q2
3.248 INCHES MINIMUM AND
3.250